GB859329A - Siloxane anti-foam emulsions - Google Patents

Siloxane anti-foam emulsions

Info

Publication number
GB859329A
GB859329A GB3601/59A GB360159A GB859329A GB 859329 A GB859329 A GB 859329A GB 3601/59 A GB3601/59 A GB 3601/59A GB 360159 A GB360159 A GB 360159A GB 859329 A GB859329 A GB 859329A
Authority
GB
United Kingdom
Prior art keywords
water
cps
viscosity
weight
emulsion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3601/59A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midland Silicones Ltd
Original Assignee
Midland Silicones Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midland Silicones Ltd filed Critical Midland Silicones Ltd
Publication of GB859329A publication Critical patent/GB859329A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • B01D19/04—Foam dispersion or prevention by addition of chemical substances
    • B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
    • B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
    • A—HUMAN NECESSITIES
    • A21—BAKING; EDIBLE DOUGHS
    • A21D—TREATMENT, e.g. PRESERVATION, OF FLOUR OR DOUGH, e.g. BY ADDITION OF MATERIALS; BAKING; BAKERY PRODUCTS; PRESERVATION THEREOF
    • A21D8/00—Methods for preparing or baking dough
    • A21D8/08—Prevention of sticking, e.g. to baking plates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
    • C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
    • Y10S516/01—Wetting, emulsifying, dispersing, or stabilizing agents
    • Y10S516/07—Organic amine, amide, or n-base containing

Abstract

An oil-in-water type emulsion consists essentially of (1) from 0,5 to 50% by weight of the emulsion of a benzene-soluble methylpolysiloxane of at least 50 cps. viscosity at 25 DEG C. containing from 1 to 15% by weight of silica or C black having a particle size not more than 2 microns, (2) water and (3) from 0,03 to 6,5% by weight of the water of methylcellulose having a viscosity of at least 400 cps. at 25 DEG C. as measured in a 2% by weight solution in water. The siloxanes used preferably have a CH3/Si ratio from 1,9 to 2,1 and may contain terminal trimethylsiloxy or hydroxyl groups, and the cellulose used contains from 27,5 to 32,0% by weight of methoxyl groups. Pigments, rust-inhibitors, antioxidants and fungicides, e.g. sorbic acid, may also be added. In typical Examples (1) a mixture (a) of two (CH3)3SiO 1/2 -end-blocked dimethylsiloxanes of different viscosities and synthetic silica having a particle size of 50m m , was mixed with (b) methyl cellulose and (c) water and sorbic acid, in a colloid mill to form stable emulsion which broke down foams when added to foamed aqueous solutions containing (A) polyoxyethylene sorbitan monooleate and (B) an alkyltrimethylammonium chloride; (4) similar results were obtained when the siloxanes of Examples (1) were replaced by a (CH3)3 SiO 1/2 -end-block dimethylsiloxane of 107 cps. viscosity (at 25 DEG C.) and thinned to a viscosity of 105 cps. with toluene. Uses: for defoaming any aqueous system, particularly in processing foodstuffs. Specifications 639,673 and 689,306 are referred to.ALSO:Defoaming of aqueous systems, particularly those in the processing of foodstuffs, is effected by adding thereto an oil-in-water type emulsion consisting essentially of (1) from 0.5 to 50% by weight of the emulsion of a benzenesoluble methylpolysiloxane of at least 50 cps. viscosity at 25 DEG C. containing from 1 to 15% by weight of silica or carbon black having a particle size not more than 2 microns, (2) water and (3) from 0.03 to 6.5% by weight of the water of methylcellulose having a viscosity of at least 400 cps. at 25 DEG C. as measured in a 2% by weight solution in water (see Group IV(a)). Pigments, rust-inhibitors, antioxidants and fungicides, e.g. sorbic acid, may also be added to the emulsions. In typical Examples (1) a mixture (a) of two trimethylsiloxy-end-blocked dimethylsiloxanes of different viscosities and synthetic silica having a particle size of 50 \m\m, was mixed with (b) methylcellulose and (c) water and sorbic acid, in a colloid mill to form a stable emulsion which broke down foams when added to foamed aqueous solutions containing (A) polyoxyethylene sorbitan mono-oleate and (B) an alkyltrimethylammonium chloride; (4) similar results were obtained when the siloxanes of (1) were replaced by a similar end-blocked siloxane of 107 cps. viscosity (at 25 DEG C.) and thinned with toluene to a viscosity of 105 cps. Specifications 639,673 and 689,306 are referred to.
GB3601/59A 1958-02-20 1959-02-02 Siloxane anti-foam emulsions Expired GB859329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US716261A US2894913A (en) 1958-02-20 1958-02-20 Antifoam emulsion

Publications (1)

Publication Number Publication Date
GB859329A true GB859329A (en) 1961-01-18

Family

ID=24877359

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3601/59A Expired GB859329A (en) 1958-02-20 1959-02-02 Siloxane anti-foam emulsions

Country Status (6)

Country Link
US (1) US2894913A (en)
BE (1) BE575897A (en)
DE (1) DE1204631B (en)
FR (1) FR1216641A (en)
GB (1) GB859329A (en)
NL (1) NL100779C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498615A1 (en) * 1981-01-28 1982-07-30 Gen Electric AQUEOUS SILICONE RESIN EMULSIONS AND PROCESS FOR THEIR PREPARATION

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL252812A (en) * 1959-06-19
US3408306A (en) * 1959-07-20 1968-10-29 Hercules Inc Method of controlling foaming
NL253992A (en) * 1959-07-20
NL273982A (en) * 1961-01-27
BE626473A (en) * 1961-12-30
US3266995A (en) * 1962-07-10 1966-08-16 Yardley Of London Inc Skin delustering colloidal silica composition and method
US3235509A (en) * 1962-10-03 1966-02-15 Wacker Chemie Gmbh Method for producing antifoam agents
US3207698A (en) * 1963-02-13 1965-09-21 Nopco Chem Co Composition and method for defoaming aqueous systems
GB1051687A (en) * 1963-05-06
US3304266A (en) * 1963-05-06 1967-02-14 Dow Corning Foam control agents
US3355395A (en) * 1964-03-27 1967-11-28 Dow Corning Antifoam composition and method of reducing and preventing foaming in aqueous systems
US3395102A (en) * 1964-06-18 1968-07-30 Midland Silicones Ltd Process and antifoaming aqueous systems
US3510433A (en) * 1967-06-05 1970-05-05 Wright Chem Corp Water treating composition and method
US4012334A (en) * 1974-11-12 1977-03-15 General Electric Company Antifoam compositions and process for the preparation and use thereof
US4039469A (en) * 1975-06-20 1977-08-02 General Electric Company Process for the preparation of aqueous antifoam compositions
US4005044A (en) * 1975-06-20 1977-01-25 General Electric Company Method of making aqueous antifoam compositions
US4089748A (en) * 1976-08-27 1978-05-16 Analytical Products, Inc. Microorganism growth process and cell
US5152924A (en) * 1990-06-01 1992-10-06 Dow Corning Corporation Rust inhibiting silicone emulsions
US5169560A (en) * 1990-09-17 1992-12-08 Betz Laboratories, Inc. Control of foam in hydrocarbon fluids
EP2601245A1 (en) 2010-08-05 2013-06-12 Biofilm IP, LLC Cyclosiloxane-substituted polysiloxane compounds, compositions containing the compounds and methods of use thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632736A (en) * 1946-08-22 1953-03-24 Dow Chemical Co Antifoaming composition
GB621188A (en) * 1947-01-17 1949-04-05 Andrew James Walters Improvements in or relating to the manufacture of aqueous emulsions
US2643240A (en) * 1950-04-13 1953-06-23 Union Carbide & Carbon Corp Polysiloxane antifoam agents
US2588367A (en) * 1950-05-04 1952-03-11 Dow Corning Rendering cellulosic material nonadherent to adhesives
US2595928A (en) * 1951-03-07 1952-05-06 Dow Corning Antifoam emulsion
DE883589C (en) * 1951-08-31 1953-07-20 Goldschmidt Ag Th Antifoam agents

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498615A1 (en) * 1981-01-28 1982-07-30 Gen Electric AQUEOUS SILICONE RESIN EMULSIONS AND PROCESS FOR THEIR PREPARATION

Also Published As

Publication number Publication date
US2894913A (en) 1959-07-14
BE575897A (en) 1959-06-15
DE1204631B (en) 1965-11-11
FR1216641A (en) 1960-04-26
NL100779C (en)

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